Gas burner



Oct. 12, 1954 PONS-nNGL 2,691,414

GAS BURNER Filed Jan. 8. 1951 TIM 7 1,

Patented- Oct. 12, 41954v 2,691,414 GAS BURNER Franz Ponstingl, Vienna,Austria Application January 8, 1951, Serial N o. 24,841

Claims priority, application Austria February 10, 1950 2 claims. 1

My invention relates to a gas burner which is not extinguished by foodboiling over. With this object in view, burners have already beenproposed in which the head tted into the free end of the mixing tube, orthe cover placed over this end, has two sets of gas mixture outletapertures disposed at different levels, which are constantly andcommonly charged during operation with the gas-air mixture deliveredthrough the mixing tube. One set of such outlet apertures is providedwith a cover to prevent obstruction and the flames continuously burningtherein when the admission of gas is not cut oli serve as ignitionflames for the re-lighting of the gas mixture as soon as this mixtureagain commences to f low through the first set of apertures.

In accordance with the invention, the said problem is solved, in aburner in which the head of the mixing tube has a cover and two sets ofoutlet apertures for thel gas-air mixture to be ignited, by providingbelow the cover, gas paths extending substantially radially to asurrounding wall of the burner, enclosing the head, and from there intothe atmosphere, from which gas paths branch paths extend downwardswithin the said surrounding wall, the said branch paths being screenedby the surrounding wall to prevent stopping up due to food boiling overand the like, and also extending into the atmosphere. On stoppage of thenormal outlet of the ignited mixture, the said mixture flows throughthese branch paths to the bottom mouth of these branch paths, where itcontinues to burn. When the obstructed radial outlet apertures are freedagain, the ignited gasair mixture travels up from the branch paths tothe rst-mentioned apertures and continues to burn in the normal manner.

Consequently, in contrast to what happens in the known constructions,the mixture only burns y at one set of outlet apertures at a time, whichis desirable. Tests have shown that the burner according to theinvention operates with complete reliability and is superior to allknown constructions.

The other features of the construction according to the invention arehereinafter explained and are illustrated in the drawings, in whichFigure 1 shows in plan view a burner with the cover removed, Figure 2shows the burner in vertical axial section along the line 2 2, Figure 3shows the burner cover as seen from below, Figure 4 shows this cover ina vertical section on the line 4-4 of Figure 3, and Figure 5 shows theburner in side elevation.

In the gas burner according to the invention.

the head of the mixing tube l is surrounded by an annular element 2which is set back from the outer surface of the head to leavethroughilow` apertures or slots 3 and is connected to the said surfaceby ribs 1i. The upper edge 5 of the mixing tube head lies at a somewhathigher level than that 6 oi the surrounding annular element or ring and,like the latter, is slightly conically flared in the outward and upwarddirection, more especially as shown in Figure 2.

The head and the annular element or ring have a top cover 'l which isprovided on its lower side (Figures 3 and 4) with a number of radialribs 8, 9 .by which it is mounted on the upper edges 5, of the head andring respectively so as to leave therebetween radial gas paths or ductsIB extending outwardly into the atmosphere. The ribs 8 and d arearranged in the form of two concentric annular rows having between theman annular space Il communicating with the downwardly leading slots 3.The inner ribs 8 are as usual of wedgeform and have sharp edges and a ator slightly curved end face l2 facing towards the stream of gas-airmixture, while the outer ribs 9 are formed with very rounded end facesI3.

Preferably, these ribs 9- have at their outer end downwardly projectingextensions I4 which somewhat overlap the outer wall surface of the ring2 and thus hold the cover fast. The lower surface of the cover is turnedsomewhat in conical form in the direction of the edge (Figure 4) .f Thegas'outlet passages ID bounded laterally by adjacent pairs of ribs 8, 9thus widen somewhat in the outward direction owing to the conical formof the lower side of the cover, and thus facilitate the discharge of thegas-air mixture.

When the gas-air mixture flows in through the mixing tube, it sweeps theobliquely rising passages Iil outwardly and is ignited at the mouththereof. Owing to the somewhat lower` upper edge 6 of the ring 2, thegas is discharged without obstruction.v

If the outlets from the radial passages into the atmosphere areobstructed owing to food boiling over, the mixture ows down through theslots 3 and burns at the outlets from these slots 3 into the atmosphere.Obstruction of these slots by food is impossible owing to the protectionalordedby the ring. When the upper or outer outlets are freed again, forexample by evaporation of the water which has boiled over and penetratedtherein, or by combustion or carbonisation of organic substances, theflames immediately travel back to the rst burning point and normaloperation is resumed.

Instead of combining the mixing tube, the head thereof and thesurrounding wall or ring to a selfcontained unit, it may sometimes bepreferred to unite only the said head and its surrounding Wall or ringto a single structure and to detachably connect this structure to themixing tube, say by screwing, A mode of execution of this kind is shownin Figure 6.

What I claim is:

l. A gas burner including in combination a tube for mixing gas and airand provided with an open ended head, a top cover for said head, avertical annular outer Wall spaced from and surrounding the upper endportion of said head, said outer wall being inseparably connected withsaid head by radial ribs and forming annular segmented channels ofessentially vertical direction between the inner side of the outer walland the outer periphery of said head, said top cover having on itsunderside an inner and outer annular set of radial ribs, the said setsbeing radially spaced and rest on the upper edges of said head and ofthe said outer ring respectively, thereby forming in combination withthe body of the top cover and the edges of the head and outer wallrespectively two series of radial channels lying in line and having aninterrupted part therebetween, the radial channels opening at the outerside of the cover into the atmosphere and conducting for ignition thegas-air mixture delivered by the mixing tube, the interrupted parts ofthe channels coinciding with the said vertical segmented channels, saidlast mentioned channels opening into the atmosphere at the lower end oithe annular outer wall.

2. A gas burner including in combination a tube for mixing gas and airand provided with an open ended head, a top cover for said head, avertical annular outer wall spaced from and surrounding the upper endportion of said head, the upper edge of said wall being in a level belowthat of the upper edge of said head, said outer wall being inseparablyconnected with said head by radial ribs and forming annular segmentedchannels of essentially vertical direction between the inner side of theouter wall and the outer periphery of said head, said top cover havingon its underside an inner and outer annular set of radial ribs the saidsets being radially spaced and resting on the upper edges of said headand of the said outer ring respectively, thereby forming in combinationwith the body of the top cover and the edges of the head and outer wallrespectively two series of radial channels lying in line and having aninterrupted part therebetween, the radial channels opening at the outerside of the cover into the atmosphere and conducting for ignition-thegasair mixture delivered by the mixing tube, the interrupted part of thechannels coinciding with said vertical segmented channels, said lastmentioned channels opening into the atmosphere at the lower end of theannular outer wall.

References Cited in the le of this patent UNITED STATES PATENTS NumberName Date 1,648,329 Seivert Nov. 8, 1927 2,464,255 Musteel Mar. l5, 19492,625,215 Hart et al Jan. 13, 1953

